The Bayreuther Festspiele will celebrate the bicentenary of Richard Wagner's birth with a new production of the Ring led by Russian conductor Kirill Petrenko and staged by German director Frank Castorf. See the programme page for the complete schedule of the festival including the operas "Der fliegende Holländer", "Tannhäuser", and "Lohengrin".
There are more anniversary events planned in Bayreuth and throughout the musical world, see e.g. this DW page.
If you only want to listen to albums recorded in Bayreuth, try to combine the tags bayreuth and richard wagner either on the Last.fm radio page with the multi-tag option on the bottom or use Combo.fm for this.

Nietzsche was a friend of Wagner before 1876. In 1876, Nietzsche attempted Bayreuth Concerts, and he was really dissapointed because of some christian and nationalsit symbols on Wagner's operas. I think they broke their relationship on January of 1877. After that, he just hated him.